Gen 6's and Sm4sh's releases are within the same timeframe. The timeframe, in this case being, we have absolutely no inkling of when they'll come out. On Sm4sh, Namco could either move slower or faster than the previous company did, which leaves a lot to chance. There's also the two game to think about. On Gen 6, it's unknown if there will be a remake before it. In addition, due to the 3ds's increased graphical capabilities vs older Nintendo handhelds, and the existance of 3d resources for all pokemon (not to mention their use in the new MD game), they may be moving away from sprites. This big change could cause the game to be delayed a fair bit (Yes, I know the pokemon already are made, but there are also locations and characters to do). Therefore, discussing Gen 6 and Sm4sh for in the same context is most likely futile at this point in time. We can speculate Smash 4, we can speculate Gen 6, but speculating on connections won't be productive. It also isn't very fun, since instead of "Genesect vs. Zoroark", it's "Genesect vs. the unknown" (No, not the boss from Kingdom Hearts).